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How is D related to A? I. B is the brother of A. II. B is D's son.

If the data in statement I alone are sufficient to answer the question
If the data in statement II alone are sufficient answer the question
If the data either in I or II alone are sufficient to answer the question;
If the data in both the statements together are needed.

Correct Answer: If the data in both the statements together are needed.

Explanation:

From both the statements together, we find that D is the father of B and B is the brother of A. So,

D is the father of A.

Thus, both the given statements are needed.

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